// 
// ICommandHandler.cs
//  
// Author:
//       Tomas Vondracek <tomas.vondracek@gmail.com>
// 
// Copyright (c) 2010 Tomas Vondracek
// 
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
// 
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

using System;

namespace Common.Interfaces
{
	public delegate void CommandUpdatedHandler(object sender, CommandUpdatedEventArgs e);
	
	public class CommandHandler : ICommand
	{
		CommandInfo commandInfo;
		
		object id;
		
		public event CommandUpdatedHandler CommandUpdate;
		
		public CommandInfo CommandInfo {
			get {
				return this.commandInfo;
			}
		}

		public object Id {
			get {
				return this.id;
			}
			set {
				id = value;
			}
		}

		public CommandHandler()
		{
			// use empty command info
			this.commandInfo = new CommandInfo();
		}
		
		public CommandHandler(object id)
			:this()
		{
			this.id = id;
		}
		
		public virtual void Update (CommandInfo commandInfo)
		{
			this.commandInfo = commandInfo;
			
			if (this.CommandUpdate != null)
				this.CommandUpdate(this, new CommandUpdatedEventArgs(this.id, this.commandInfo));
		}
		
		#region ICommand implementation
		public virtual void Run ()
		{
			
		}
		#endregion
	}
	
	public class CommandUpdatedEventArgs : EventArgs
	{
		public CommandInfo CommandInfo
		{
			get;
			set;
		}
		
		public object Id
		{
			get;
			private set;
		}
		
		public CommandUpdatedEventArgs(object id, CommandInfo info)
		{
			this.CommandInfo = info;
			this.Id = id;
		}
	}
}

